Q. In bearing capacity analysis, what does the term 'overburden pressure' refer to?
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A.
Pressure from the foundation itself
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B.
Pressure from the soil above the foundation
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C.
Pressure from groundwater
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D.
Pressure from lateral earth forces
Solution
Overburden pressure refers to the pressure exerted by the weight of the soil above the foundation, which contributes to the effective stress.
Correct Answer:
B
— Pressure from the soil above the foundation
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Q. What is the effect of soil cohesion on the bearing capacity of a foundation?
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A.
Increases bearing capacity
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B.
Decreases bearing capacity
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C.
No effect
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D.
Varies with soil type
Solution
Soil cohesion contributes positively to the bearing capacity of a foundation, particularly in cohesive soils.
Correct Answer:
A
— Increases bearing capacity
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Q. What is the effect of the water table on the bearing capacity of a foundation?
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A.
Increases bearing capacity
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B.
Decreases bearing capacity
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C.
No effect
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D.
Depends on soil type
Solution
The presence of a high water table can decrease the effective stress in the soil, thereby reducing the bearing capacity of a foundation.
Correct Answer:
B
— Decreases bearing capacity
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Q. What is the primary factor affecting the bearing capacity of shallow foundations?
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A.
Soil type
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B.
Foundation depth
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C.
Water table level
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D.
All of the above
Solution
The bearing capacity of shallow foundations is influenced by soil type, foundation depth, and water table level, making all of these factors critical.
Correct Answer:
D
— All of the above
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Q. What is the primary purpose of a bearing capacity test?
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A.
To determine soil permeability
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B.
To assess soil consolidation
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C.
To evaluate soil shear strength
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D.
To establish the load-bearing capacity of soil
Solution
The primary purpose of a bearing capacity test is to establish the load-bearing capacity of the soil to ensure safe foundation design.
Correct Answer:
D
— To establish the load-bearing capacity of soil
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Q. Which method is commonly used to calculate the ultimate bearing capacity of a foundation?
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A.
Terzaghi's equation
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B.
Meyerhof's method
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C.
SPT method
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D.
CPT method
Solution
Terzaghi's equation is a widely used method for calculating the ultimate bearing capacity of shallow foundations.
Correct Answer:
A
— Terzaghi's equation
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Q. Which of the following factors does NOT directly affect the bearing capacity of a foundation?
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A.
Soil density
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B.
Foundation shape
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C.
Soil plasticity index
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D.
Foundation material
Solution
While soil density, foundation shape, and soil plasticity index directly affect bearing capacity, the material of the foundation itself does not.
Correct Answer:
D
— Foundation material
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Q. Which of the following is NOT a method for calculating bearing capacity?
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A.
Rankine's theory
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B.
Bishop's method
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C.
Meyerhof's method
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D.
Terzaghi's method
Solution
Bishop's method is primarily used for slope stability analysis, not for calculating bearing capacity.
Correct Answer:
B
— Bishop's method
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